Which of the following is FALSE when considering the standard genetic code?
a. Each of the three stop codons can also encode rare modified amino acids.
b. Apart from methionine, the only other amino acid with a single codon is tryptophan.
c. Three separate codons encode translation stop signals. #AUG serves as the translation start codon in most cases.
d. There are 64 possible codons to represent 20 common amino acids.
